A length of tubing, straight, or prebent to a predetermined angle, with added component(s) that forms an end connection on one or both ends. For flexible tube assemblies, see HOSE ASSEMBLY (as modified). For items having perforations in the tubing or attachments, see TUBE ASSEMBLY, FIRE EXTINGUISHING SYSTEM. Excludes items having integral preformed or plain ends, TUBE, BENT (as modified), and items which are branched or forked.